[Home](./index.md) > [@firebase/auth](./auth.md) > [OAuthProvider](./auth.oauthprovider.md) > [setCustomParameters](./auth.oauthprovider.setcustomparameters.md) ## OAuthProvider.setCustomParameters() method Sets the OAuth custom parameters to pass in an OAuth request for popup and redirect sign-in operations. Signature: ```typescript setCustomParameters(customOAuthParameters: CustomParameters): AuthProvider; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | customOAuthParameters | [CustomParameters](./auth.customparameters.md) | The custom OAuth parameters to pass in the OAuth request. | Returns: [AuthProvider](./auth.authprovider.md) ## Remarks For a detailed list, check the reserved required OAuth 2.0 parameters such as `client_id`, `redirect_uri`, `scope`, `response_type`, and `state` are not allowed and will be ignored.